CODE P0500 - VEHICLE SPEED SENSOR (VSS)
1. Turn ignition off. Block rear wheels. Set parking brake. Raise and support front of vehicle. Turn ignition on. Block right front wheel. Slowly rotate left front wheel while measuring voltage between 26-pin ECM connector terminal 26 (Brown/Black wire) and ECM 16-pin ECM connector terminal No. 13 (Orange wire).
2. If voltage does not pulse from zero to 5 volts, go to next step. If voltage pulses from zero to 5 volts, temporarily substitute known good ECM, then retest system.
3. Inspect for open or short in Orange wire between ECM and VSS. Repair as necessary. If wire is okay, replace VSS.
Thursday, February 3rd, 2011 AT 2:21 PM